Not something you want to happen.
In addition there is a second hole in the play roll that is opened when the piano has the roll almost completely wound. This does not stop the piano (there is another signal that tells the piano "no paper" and to shut off) but if repeat is selected it will throw a vacuum pneumatic to switch the piano from "rewind" to "play" mode and start playing it again.
This is controlled by a dual pneumatic located under the front of the piano on the right side, under the keys. And on my piano this particular pair of pneumatics was... weak. Partially because the pipes feeding it were loose (no vacuum there) but mainly because it had been broken in the past and the pneumatic cloth is very leaky.
So time to replace it. Dropping it is not hard; 3 screws secure it to the piano and getting the shift lever out is not hard. With it on the table we can now take a look at it and figure out how to recover.
Boy is it dirty. Time to start taking it apart. Goal is to get the old cloth off, recover it, and figure out how to fix those broken arms (fixed with wire? Oh well someone did that....)
